mqtt stuff added

node_modules/mqtt-packet/testRandom.js

@@ -0,0 +1,90 @@
+'use strict'
+
+var mqtt = require('./')
+var crypto = require('crypto')
+var max = 1E5
+var i
+var start = Date.now() / 1000
+var time
+var errors = 0
+var packets = 0
+var randomPacket
+var firstBytes = [
+  16 * 1, // CONNECT
+  16 * 2, // CONNACK
+  16 * 3, // PUBLISH, QoS: 0, No Retain, No Dup
+  16 * 3 + 1, // PUBLISH, QoS: 0, Retain, No Dup
+  16 * 3 + 8, // PUBLISH, QoS: 0, No Retain, Dup
+  16 * 3 + 1 + 8, // PUBLISH, QoS: 0, Retain, Dup
+  16 * 3 + 2, // PUBLISH, QoS: 1, No Retain, No Dup
+  16 * 3 + 2 + 1, // PUBLISH, QoS: 1, Retain, No Dup
+  16 * 3 + 2 + 8, // PUBLISH, QoS: 1, No Retain, Dup
+  16 * 3 + 2 + 1 + 8, // PUBLISH, QoS: 1, Retain, Dup
+  16 * 3 + 4, // PUBLISH, QoS: 2, No Retain, No Dup
+  16 * 3 + 4 + 1, // PUBLISH, QoS: 2, Retain, No Dup
+  16 * 3 + 4 + 8, // PUBLISH, QoS: 2, No Retain, Dup
+  16 * 3 + 4 + 1 + 8, // PUBLISH, QoS: 2, Retain, Dup
+  16 * 4, // PUBACK
+  16 * 5, // PUBREC
+  16 * 6, // PUBREL
+  16 * 7, // PUBCOMP
+  16 * 8, // SUBSCRIBE
+  16 * 9, // SUBACK
+  16 * 10, // UNSUBSCRIBE
+  16 * 11, // UNSUBACK
+  16 * 12, // PINGREQ
+  16 * 13, // PINGRESP
+  16 * 14, // DISCONNECT
+  16 * 15  // RESERVED
+]
+
+function doParse () {
+  var parser = mqtt.parser()
+
+  parser.on('error', onError)
+  parser.on('packet', onPacket)
+  randomPacket = crypto.randomBytes(Math.floor(Math.random() * 512))
+
+  // Increase probability to have a valid first byte in order to at least
+  // enter the parser
+  if (Math.random() > 0.2 && randomPacket.length > 0) randomPacket.writeUInt8(firstBytes[Math.floor(Math.random() * firstBytes.length)], 0)
+  parser.parse(randomPacket)
+}
+
+try {
+  console.log('Starting benchmark')
+  for (i = 0; i < max; i++) {
+    doParse()
+  }
+} catch (e) {
+  console.log('Exception occurred at packet')
+  console.log(randomPacket)
+  console.log(e.message)
+  console.log(e.stack)
+}
+
+function onError () {
+  errors++
+}
+
+function onPacket () {
+  packets++
+}
+
+var delta = Math.abs(max - packets - errors)
+time = Date.now() / 1000 - start
+console.log('Benchmark complete')
+console.log('==========================')
+console.log('Sent packets:', max)
+console.log('Total time:', Math.round(time * 100) / 100, 'seconds', '\r\n')
+
+console.log('Valid packets:', packets)
+console.log('Erroneous packets:', errors)
+
+if ((max - packets - errors) < 0) console.log('Excess packets:', delta, '\r\n')
+else console.log('Missing packets:', delta, '\r\n')
+
+console.log('Total packets:', packets + errors)
+console.log('Total errors:', errors + delta)
+console.log('Error rate:', ((errors + delta) / max * 100).toFixed(2) + '%')
+console.log('==========================')